performance stress test

performance-stress.js

'use strict';
const cluster = require('cluster');
const os = require('os');
const now = () => performance.now();
let time = 10000;
let start = now();
let end = start + time;
if (cluster.isMaster) {
  let total = 0;
  const numCPUs = os.cpus().length;
  // console.log('Creating', numCPUs, 'clusters');
  for (let i = 0; i < numCPUs; ++i) {
    const forked = cluster.fork();
    forked.on('message', (count) => {
      return total += count;
    });
  }
  process.on('exit', () => {
    console.log(
      'Number operations', total,
      ', Time(s):', time / 1000,
      ', Num clusters (CPUs)', numCPUs
      // ', Details:', details
    );
  });
} else if (cluster.isWorker) {
  let count = 0;
  while (now() <= end) {
    count++;
  }
  process.send(count);
  cluster.worker.disconnect();
}